I know there are a lot of posts about this already & I've looked them up. I was thinking about using this stuff in my 590 when I get it. Is the action noticably smoother? I've heard Mobil 1 changed their specs, would that be an issue?

ATF is not technically a lubricant. It is a hydraulic fluid. It has some lubricating qualities, but should not be relied upon to lubricate. Synthetic motor oil from Mobil 1, Castrol, Valvoline, etc in 5W-30 or 10W-30 do make very good gun lubricants.

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In life, strive to take the high road....It offers a better field of fire.
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I am currently doing some testing with metal and saltwater. While I am not ready to release my tests or my findings at this time, I will say that Fluid Film has far exceeded other water protectants and other products designed for metal on metal wear.

I am currently doing some testing with metal and saltwater. While I am not ready to release my tests or my findings at this time, I will say that Fluid Film has far exceeded other water protectants and other products designed for metal on metal wear.

So JD. I see you're up to another self aggrandizing test at your expense to demonstrate your awesomeness to we unfortunate mere mortals. I'm hotching to know the results but am too busy being offended that I didn't have the imagination to do it to appreciate it.

We have been using it for almost 6 years at the Academy for the AR-15 Patrol Rifle Instructor Certification School. It is good stuff. Below find our formula. Go to an RC Shop or a Wal-Mart and get you a small gas can smaller the better.

Mix 1 Qt. Of 5 W 50 Mobile #1 Synthetic Motor Oil with 1/2 Quart of Mobile #1 Synthetic Transmission Fluid and you have the finest lube you can buy.
Just thinking out lowed! It also contains a small amount of detergent that seems to keep the carbon down and also makes the carbon easier to clean off. And that makes a whole Quart and a half of great lube at an inexpensive cost compared to a Quart and a half of normal gun lube $$$$$. If you are going to be using it in extreme cold in the 10 degrees or colder go to the same formula with a lower viscosity.